I think you'd be better off with a Colocasia since Alocasia in my experience is a bit more delicate. Black Runner, which is a Colocasia does really well in blazing hot sun, but it's not name Black RUNNER for nothing. It can get a bit out of hand if it's happy - Coffee Cups, Colocasia too also seems to do ok in full blazing hot sun as long as it's watered really well and not allowed to get on the dry side. Thai Giant, C. gigantea likes full blazing hot sun too as long as it has a LOT of water and the leaves get huge.

"The Universe speaks in many languages, but only one voice. It speaks in the language of hope; It speaks in the language of trust; It speaks in the language of strength, and the language of compassion. It is the language of the heart and the language of the soul. But always, it is the same voice. It is the voice of our ancestors, speaking through us, And the voice of our inheritors, waiting to be born. It is the small, still voice that says: We are one. No matter the blood; No matter the skin; No matter the world; No matter the star; We are one. No matter the pain; No matter the darkness; No matter the loss; No matter the fear; We are one. Here, gathered together in common cause. we agree to recognize this singular truth, and this singular rule: That we must be kind to one another, because each voice enriches us and ennobles us, and each voice lost diminishes us. We are the voice of the Universe, the soul of creation, the fire that will light the way to a better future. We are one."

Most of your Colocasias' and Alocasias' will do okay in full sun as long as they have an adequate supple of water and I do mean adequate. With a large leaf surface they transpire a lot of water quickly especially if it's windy. I would stay away from C. Gigantea and even Thai Giant. Their leaves are too prone to breaking in wind and if your facing west, prevailing winds will rip them up. (Experience here with Thai Giant ) In my estimate Alocasias would do better because of their thicker leave structure on the west side where it would get sun from late morning to sun down, but again water is the key. But that's my opinion

Calidora, Odora, Portora, Macrorrhiza and Mac. 'Borneo Giant' come to mind first off. I agree with Kurt on the water. You can fertilize at every watering with 20-25% strength water soluble ferts. Jay, after a few weeks in the Spring. You can have massive plants down there with your growing season.